sync: update from private repo (fd190dc)

ui/src/components/detail/DetailHeader.tsx

@@ -102,7 +102,7 @@ function ShareButton({ taskId, shareToken, onShareChange }: { taskId: number; sh
         onClick={handleCopy}
         title={copied ? 'コピーしました' : '共有リンクをコピー'}
         aria-label="共有リンクをコピー"
-        className={`${iconBtnBase} ${copied ? 'border-emerald-200 bg-emerald-50 text-emerald-700' : 'border-hairline bg-canvas text-slate-600 hover:text-slate-900 hover:bg-surface'}`}
+        className={`${iconBtnBase} ${copied ? 'border-emerald-200 dark:border-emerald-500/30 bg-emerald-50 dark:bg-emerald-500/15 text-emerald-700 dark:text-emerald-300' : 'border-hairline bg-canvas text-slate-600 hover:text-slate-900 hover:bg-surface'}`}
       >
         {copied ? (
           <svg className="w-3.5 h-3.5" viewBox="0 0 16 16" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
@@ -120,7 +120,7 @@ function ShareButton({ taskId, shareToken, onShareChange }: { taskId: number; sh
         disabled={unshareMutation.isPending}
         title="共有を停止"
         aria-label="共有を停止"
-        className={`${iconBtnBase} border-hairline bg-canvas text-slate-500 hover:text-red-700 hover:border-red-200 hover:bg-red-50`}
+        className={`${iconBtnBase} border-hairline bg-canvas text-slate-500 hover:text-red-700 dark:hover:text-red-300 hover:border-red-200 hover:bg-red-50 dark:hover:bg-red-500/15`}
       >
         {unshareMutation.isPending ? (
           <svg className="w-3.5 h-3.5 animate-spin" viewBox="0 0 24 24" fill="none">